1222642256 has 20 divisors (see below), whose sum is σ = 2584221504. Its totient is φ = 555746400.

The previous prime is 1222642249. The next prime is 1222642279. The reversal of 1222642256 is 6522462221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3473240 + ... + 3473591.

Almost surely, 2^1222642256 is an apocalyptic number.

1222642256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1222642256 is an abundant number, since it is smaller than the sum of its proper divisors (1361579248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222642256 is a wasteful number, since it uses less digits than its factorization.

1222642256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946850 (or 6946844 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

The square root of 1222642256 is about 34966.3017203707. The cubic root of 1222642256 is about 1069.3005753127.

The spelling of 1222642256 in words is "one billion, two hundred twenty-two million, six hundred forty-two thousand, two hundred fifty-six".